You must program one or the other

A Haskell compiler in Common Lisp or a Common Lisp compiler in Haskell. Which do you choose and |WHY?|

Java compileuse it would bbe so easy.r in assembly. Beca

Doesn't the

>>1
both are np complete

The former. Haskell can be implemented simply as an embedded language with macros.

The latter. Lisp can be implemented simply as an embedded language with monads.

I'd choose the former so that I could then implement the latter

The first, but I prefer when a language bootstraps itself, in which case:
1) a minimal Haskell interpreter in CL, then write the compiler in Haskell and bootstrap it with that interpreter, and then continue using the compiler.
2) a minimal CL interpreter written in Haskell, then write the compiler in CL and bootstrap it with that interpreter, and then continue writing the entire implementation in CL.

I think languages like CL and Haskell are best implemented in themselves.